Why does the galvanised article is protected against rusting even if the zinc coating is broken?

Why does the galvanised article is protected against rusting even if t

1.	Why does the galvanised article is protected against rusting even if the zinc coating is broken?
Answer» As the zinc is coated the strong layer of ZnO get deposited on the iron article which protects the iron article from rusting though the zinc coating is. broken